U.S. equities drifted lower again on Friday as investors were spooked by comments from North Korea’s foreign minister that it considers President Trump’s Twitter taunts — “little rocket man” and all that — tantamount to a declaration of war. The White House responded that this was absurd. In the end, the Dow Jones Industrial Average lost 0.2%, the S&P 500 gave back 0.2%, the Nasdaq Composite shed 0.9% and the Russell 2000 bucked the trend to gain 0.1%.